CN104180700A - Radial inclined seam and vertical broken seam combined fin applied to small-tube-diameter heat exchangers - Google Patents
Radial inclined seam and vertical broken seam combined fin applied to small-tube-diameter heat exchangers Download PDFInfo
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- CN104180700A CN104180700A CN201410415793.3A CN201410415793A CN104180700A CN 104180700 A CN104180700 A CN 104180700A CN 201410415793 A CN201410415793 A CN 201410415793A CN 104180700 A CN104180700 A CN 104180700A
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Abstract
The invention discloses a radial inclined seam and vertical broken seam combined fin applied to small-tube-diameter heat exchangers. The center of the fin is provided with a positioning hole used for accommodating a copper tube, a windward area of the fin is provided with a plurality of inclined seams used for heat conduction along the temperature gradient direction, and a leeward area of the fin is provided with a plurality of vertical seams. The inclined seams are symmetrically distributed relative to the horizontal center line of the fin, and directions of the inclined seams all point to a heat exchanger tube namely the temperature gradient direction of the fin. The radial inclined seam and vertical broken seam combined fin has the advantages that development of an air boundary layer on the fin can be restrained, and excellent heat conductivity of the fin can be guaranteed.
Description
Technical field
What the present invention relates to is a kind of device of heat exchange of heat pipe technical field, specifically a kind of be applied to the radially R-joining of 5mm and following small-pipe diameter heat exchanger and vertically between the fin of breaking joint combination slot opening form.
Background technology
The evaporimeter of room air conditioner and condenser mostly adopt the finned tube exchanger being made up of copper pipe and aluminium fin, copper pipe external diameter be wherein generally 7mm and more than.If it is 5mm and following pipe with small pipe diameter copper pipe that copper pipe is changed to external diameter, can reduces the cost of heat exchanger and the charging amount of cold-producing medium, but can affect because of reducing of heat exchange area the performance of heat exchanger.Therefore need to propose the augmentation of heat transfer technology for the finned tube exchanger of employing pipe with small pipe diameter copper pipe.
The key that improves the performance of small pipe diameter fin heat exchange of heat pipe is the heat exchange property that strengthens air side, reduces the thermal resistance of air side, and this is because the thermal resistance of air side is the major part of heat exchanger thermal resistance.The main points that reduce finned tube exchanger air side thermal resistance are: the one, and stop the boundary layer of air of fin surface to be thickeied gradually, the 2nd, allow pipe and whole fin all have good heat conduction.
The method of existing reduction air side thermal resistance is to crack in the vertical direction of air flow mostly, thickeies gradually with the boundary layer of air that stops fin surface.
Through the retrieval of prior art is found, Chinese patent literature CN 202008311, open day 2011-10-12, discloses a kind of fin of fin-tube heat exchanger, and described fin flows to direction at vertical air and offers bar shaped seam.Although the fin vertically cracking can stop the thickening in fin surface boundary layer, crack and can cut off the heat conduction between heat exchanger tube and fin, therefore cause the heat conduction between pipe and whole fin good not.
Chinese patent literature CN 101726208, open day 2010-6-9, discloses a kind of copper fin, and the main slot opening form of described fin is still traditional bar shaped seam, and its feature is that the centre of two pipes has R-joining.This fin only adopts R-joining to avoid heat conduction to be cut off in less part; In the main body of fin, heat conduction is still cut off by vertical lap seam.
Current technology is not according to the requirement of small pipe diameter fin heat exchange of heat pipe, and proposition can stop the boundary layer of air thickening of fin surface, and also pipe and whole fin all have good heat conducting high-efficiency fin simultaneously; Therefore be necessary to invent a kind of fin of the high efficient heat exchanging for small-pipe diameter heat exchanger, can suppress boundary layer of air thickening, can ensure that again fin has thermal conductive resin.
Summary of the invention
The present invention is directed to prior art above shortcomings, provide a kind of radially R-joining that is applied to small-pipe diameter heat exchanger and vertically between the fin of breaking joint combination, can suppress boundary layer of air thickening, can ensure that again fin has thermal conductive resin, thereby obtain good heat exchange property.
The present invention is achieved by the following technical solutions, the center of this fin is provided with the locating hole that holds copper pipe, in the district windward of fin, being provided with some along thermograde direction cracks for the oblique of heat conduction, leeward district is provided with some and vertically cracks, wherein: each oblique crack symmetrical in the horizontal center line of fin, and R-joining direction is all pointed to heat exchanger tube, i.e. the thermograde direction of fin; Each vertically crack symmetrical in the horizontal center line of fin, each putting in order along thermograde direction of vertically cracking, the heat conduction that makes fin is along the periphery conduction of vertically cracking.
Described oblique crack be shaped as strip, it is oblique that to crack with the angle of horizontal center line be 20 °～80 °.
Described vertically crack be shaped as strip.
Described oblique length of cracking is greater than the length of vertically cracking.
The quantity of described locating hole is at least 1 row, when quantity is 2 rows when above, and each locating hole cross arrangement.
Technique effect
Compared with prior art, fin of the present invention the cracking and can effectively avoid the heat conduction cut-out of being cracked along thermograde oblique of district windward; The vertical interruption break joint in the leeward district of fin plays good inhibitory action for boundary layer of air, and its sequence along thermograde simultaneously can be avoided the partition for heat conduction preferably.Fin of the present invention can make the coefficient of heat transfer of fin promote 10%; The slotting structure of fin is simple, is convenient to processing.
Brief description of the drawings
Fig. 1 is heat conduction and the Development of Boundary Layer schematic diagram of fin of the present invention;
Fig. 2 is the structure chart of fin of the present invention;
Fig. 3 is the B portion enlarged drawing of Fig. 2;
Fig. 4 is that the A-A of Fig. 2 is to cutaway view;
Fig. 5 is flat fin heat conduction and Development of Boundary Layer schematic diagram;
Fig. 6 is traditional slitted fin heat conduction and Development of Boundary Layer schematic diagram;
Fig. 7 is fin temperature profile of the present invention and the comparison of traditional fin temperature profile.
Detailed description of the invention
Below embodiments of the invention are elaborated, the present embodiment is implemented under taking technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As depicted in figs. 1 and 2, the center of the present embodiment fin 1 is provided with the locating hole 2 that holds copper pipe, and the vertical center line of fin 1 is district 3 windward near a side of air intake, and vertically the side away from air intake of center line is leeward district 4; In district 3 windward, be provided with long oblique of some names and crack 5, the incline direction cracking, along thermograde direction, can not cut off the original heat conduction of fin; In leeward district 4, have some shorter vertically to crack 6, what vertically crack puts in order along thermograde direction, can ensure to allow the heat conduction of fin carry out along the periphery fin of short vertical masonry joint; Oblique crack 5 and 6 the combining form of vertically cracking can, in destroying boundary layer of air, substantially not produce the partition effect for heat conduction.
Described each obliquely cracks 5 symmetrically in the horizontal center line of fin 1, and R-joining direction is all pointed to heat exchanger tube.
Described oblique cracking for strip, each the thermograde direction that the oblique direction of cracking is fin, with the angle of horizontal center line be 20 °～80 °.
Described each vertically cracks 6 symmetrically in the horizontal center line of fin 1, arranges along the thermograde direction of fin.
Crack 6 the strip that is shaped as of described vertical interruption.
Described each oblique 5 the length of cracking is greater than vertically cracks 6.
The quantity of described locating hole 2 be 1 row or 2 rows and more than, when quantity is 2 rows when above, each locating hole 2 cross arrangements.
As shown in Figure 1, the fin 1 of the present embodiment can ensure that fin can stop Development of Boundary Layer to have again good thermal conductivity.In the district windward 3 of fin 1, air and fin 1 heat exchange are stronger, have larger thermograde on fin 1, therefore open R-joining along thermograde direction and can avoid cutting off the heat conduction on fin 1, ensure that fin 1 has good heat conductivility, can suppress the thickening of boundary layer of air simultaneously.Therefore offer three radially R-joinings at the windward side of fin 1, in Fig. 1, represent that by the arrow curve of heat exchanger tube sensing fin 1 windward side the novel combination fin 1 of the present embodiment has good heat conductivility.Fig. 2 has shown crack in the district windward value of parameter of fin.The projected length i of outermost R-joining gets 3mm and fin 1 short transverse angle c gets 108 °; The R-joining projected length j mediating gets 7mm; Get 4.5mm in the most radially R-joining projected length h of inner side, 1 short transverse angle d gets 156 ° with fin.The distance r of the outermost R-joining front end of offering and fin 1 center line gets 7mm, and the distance q of the front end of inner side R-joining and fin 1 center line gets 2.2mm.
In the leeward district 4 of fin 1, the thermograde on the weak fin 1 of air and fin 1 heat exchange is also less, and the disturbance that the vertical short seam of therefore arranging along thermograde direction can strengthen air under the prerequisite of heat conduction of not cutting off fin 1 prevents Development of Boundary Layer.Therefore offer three row in the leeward district of fin 1 and be vertically interrupted short seam, Fig. 2 has shown the structural parameters of the vertical short seam of offering in the leeward district of fin.The short seam length f of row near heat exchanger tube gets 2.5mm, gets 1.5mm with fin 1 center line distance from n; Lean on into the short seam length 2e of row of fin 1 center line and get 4mm, the width m that cracks gets 0.6mm.Spacing p between vertical short seam gets 0.8mm.
As shown in Figure 1, air is in horizontal obstruction of being cracked while plunderring the present embodiment fin 1, and the development in boundary layer is suppressed, and the coefficient of heat transfer improves; The present embodiment fin 1 is offered bar seam along fin thermograde direction simultaneously, has ensured good heat conductivility.Therefore the present embodiment fin all has good performance aspect two of heat conduction and heat transfer intensities.
Fig. 2, Fig. 3 and Fig. 4 are the structure chart of the present embodiment fin 1.In Fig. 2, the aperture s of locating hole 2 gets 5.2mm, and the column pitch a of fin 1 locating hole 2 gets 17mm, and the line space b of fin 1 locating hole 2 gets 14.7mm.Fin 1 adopts two combs to arrange, fin 1 width is that 2*b is taken as 29.4mm.Fin 1 thickness k is taken as 0.095mm, and the height w that cracks is taken as 0.5mm.Fin 1 flange diameter t gets 6mm, and flange locating hole 2 diameter u get 6.9mm.The air intake direction of heat exchanger is as shown in the arrow in Fig. 2.
As shown in Figure 5, the fin 1 of flat fin 1 heat exchanger has ensured the heat conductivility of fin, but the development in boundary layer is not suppressed, and the coefficient of heat transfer is lower.Because flat fin 1 does not crack, heat can be along any direction conduction on fin 1, and heat conductivility is better; But be not subject to any obstruction while plunderring flat fin 1 because air is horizontal, boundary layer is being developed always, cause boundary layer thickening, the coefficient of heat transfer reduces.
As shown in Figure 6, traditional slitted fin 1 can stop the development in boundary layer, the partition but fin 1 heat conduction is cracked.Bar seam and the fin 1 heat conduction direction near normal of tradition slitted fin, crack and cut off heat conduction, causes the heat conduction that can not get heat exchanger tube away from the fin region of copper pipe, and heat exchange amount is few.In Fig. 4, represent heat conduction direction by the outside arrow curve of the inner sensing of copper pipe, wherein near the heat conduction curve cracking is because the existence of cracking is cut off, fin 1 two ends from copper pipe away from can not get the heat conduction of copper pipe, make the temperature at fin 1 two ends low, and heat exchange efficiency is low.
Fig. 7 is fin 1 temperature profile and the 1 temperature profile contrast of traditional slitted fin of the present embodiment.In figure, A is the fin 1 of the present embodiment; In figure, B is traditional slitted fin.From figure, relatively can find, the temperature at the fin two ends of the present embodiment fin 1 is all higher than the temperature of traditional fin 1.Tradition slitted fin is consistent with the direction of cracking in the windward side thermoisopleth direction of fin 1, illustrates that cracking of traditional fin cut off the heat conduction of fin 1; The fin 1 in this part region does not obtain heat exchanger tube and conducts the heat of coming, and makes fin 1 regional temperature of this part lower.The direction of cracking of the present embodiment, along thermograde direction, is not cut off the heat conduction on fin, has ensured that fin has good heat conductivility.
Claims (6)
- A radially R-joining that is applied to small-pipe diameter heat exchanger and vertically between the fin of breaking joint combination, it is characterized in that: the center of this fin is provided with the locating hole that holds copper pipe, in the district windward of fin, being provided with some along thermograde direction cracks for the oblique of heat conduction, leeward district is provided with some and vertically cracks, wherein: each oblique crack symmetrical in the horizontal center line of fin, and R-joining direction is all pointed to heat exchanger tube, it is the thermograde direction of fin, each vertically cracks symmetrical in the horizontal center line of fin, each putting in order along thermograde direction of vertically cracking, make the heat conduction of fin along the periphery conduction of vertically cracking.
- The radially R-joining that is applied to small-pipe diameter heat exchanger according to claim 1 and vertically between the fin of breaking joint combination, it is characterized in that, described oblique crack be shaped as strip, it is oblique that to crack with the angle of horizontal center line be 20 °～80 °.
- The radially R-joining that is applied to small-pipe diameter heat exchanger according to claim 1 and vertically between the fin of breaking joint combination, it is characterized in that, described vertically crack be shaped as strip.
- The radially R-joining that is applied to small-pipe diameter heat exchanger according to claim 1 and vertically between the fin of breaking joint combination, it is characterized in that, described oblique length of cracking is greater than the length of vertically cracking.
- 5. according to the radially R-joining that is applied to small-pipe diameter heat exchanger described in claim 1-4 any one with the fin of breaking joint combination vertically, it is characterized in that, the quantity of described locating hole is arranged at least 1.
- 6. according to the radially R-joining that is applied to small-pipe diameter heat exchanger described in claim 1-4 any one with the fin of breaking joint combination vertically, it is characterized in that, described locating hole quantity is 2 rows when above, each locating hole cross arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415793.3A CN104180700B (en) | 2014-08-22 | 2014-08-22 | Be applied to small-pipe diameter heat exchanger radial direction R-joining and vertically between the fin of breaking joint combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415793.3A CN104180700B (en) | 2014-08-22 | 2014-08-22 | Be applied to small-pipe diameter heat exchanger radial direction R-joining and vertically between the fin of breaking joint combination |
Publications (2)
| Publication Number | Publication Date |
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| CN104180700A true CN104180700A (en) | 2014-12-03 |
| CN104180700B CN104180700B (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410415793.3A Active CN104180700B (en) | 2014-08-22 | 2014-08-22 | Be applied to small-pipe diameter heat exchanger radial direction R-joining and vertically between the fin of breaking joint combination |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403689A (en) * | 2016-11-30 | 2017-02-15 | 海信科龙电器股份有限公司 | Corrugated fin and air-conditioning heat exchanger |
| CN106642642A (en) * | 2017-02-10 | 2017-05-10 | 珠海格力电器股份有限公司 | Finned tube type heat exchanger and air conditioner having same |
| CN108204763A (en) * | 2017-12-29 | 2018-06-26 | 海信科龙电器股份有限公司 | A kind of mixed type fin and air conditioner |
| CN111433549A (en) * | 2017-07-17 | 2020-07-17 | 分形散热器技术有限责任公司 | Multi-fractal heat sink system and method |
| CN112313467A (en) * | 2018-07-19 | 2021-02-02 | 凯尔维翁机械冷却系统有限公司 | Heat exchanger |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1809722A (en) * | 2003-05-23 | 2006-07-26 | 三菱电机株式会社 | Plate fin tube-type heat exchanger |
| JP2010230290A (en) * | 2009-03-30 | 2010-10-14 | Panasonic Corp | Finned heat exchanger |
-
2014
- 2014-08-22 CN CN201410415793.3A patent/CN104180700B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1809722A (en) * | 2003-05-23 | 2006-07-26 | 三菱电机株式会社 | Plate fin tube-type heat exchanger |
| JP2010230290A (en) * | 2009-03-30 | 2010-10-14 | Panasonic Corp | Finned heat exchanger |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403689A (en) * | 2016-11-30 | 2017-02-15 | 海信科龙电器股份有限公司 | Corrugated fin and air-conditioning heat exchanger |
| CN106642642A (en) * | 2017-02-10 | 2017-05-10 | 珠海格力电器股份有限公司 | Finned tube type heat exchanger and air conditioner having same |
| CN111433549A (en) * | 2017-07-17 | 2020-07-17 | 分形散热器技术有限责任公司 | Multi-fractal heat sink system and method |
| CN108204763A (en) * | 2017-12-29 | 2018-06-26 | 海信科龙电器股份有限公司 | A kind of mixed type fin and air conditioner |
| CN112313467A (en) * | 2018-07-19 | 2021-02-02 | 凯尔维翁机械冷却系统有限公司 | Heat exchanger |
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| Publication number | Publication date |
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| CN104180700B (en) | 2016-08-31 |
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